Subject	tropical rain forest
Predicate	be threatened by
Object	human activities
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.6145
Neighborhood Sigma	0.6446
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source tropical rain forests are threatened by human activities 1 Google Autocomplete tropical rain forests and grasslands are threatened by human activities 2 Answers.com Questions